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"mod_access_referer" Denial of Service

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Release Date:  2003-04-17    Last Update:  2005-01-19    Views:  10,209

Secunia Advisory SA8612

Where:

From remote

Impact:

DoS

Solution Status:

Unpatched

CVE Reference(s):

Description


A vulnerability has been identified in "mod_access_referer", which is an access control module for the Apache web server.

The vulnerability is caused by a NULL pointer dereference bug in the function "is_ip()". This can be exploited by a malicious person to cause a DoS (Denial of Service) on a webserver with the vulnerable module installed by sending a specially crafted HTTP request with a malformed "Referer:" header.


Solution:
Don't use this module, since access control based on the "Referer:" header is trivial to circumvent.

Provided and/or discovered by:
zillion

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: "mod_access_referer" Denial of Service

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